The control group outs the one that you don't change. The reason you don't change it is because you use it as a comparison with the other groups.
I believe the answer should be solar
Answer:
The cell wall gives the plant stability
Explanation:
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The answer is biological evolution.
The theory of biological evolution explains how organisms evolved during the time. It explains how the characteristics of different species changed over generations. According to the theory, most of current species developed from some distinctly different species that have lived a long time ago.
